Sprayer



W. A. PITT.

SPRAYER.

' APPLICATION FILED MAY1,I920- Patented Apr. 4, 1922.

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WILLIAM A. mm, or monmnan, ounnm'canam.

SPRAYER.

Specification of Letters Patent.

Patented Apr. 4, 1922.

Application filed m 1,-1920. Serial No. 378,243.

I To all whom it may concern Be it known that I, WILLIAM A. PITT, of

the city 'of Montreal, Province of Quebec,

Dominion of Canada,-have invented certain new and useful Improvements in Sprayers; and I do hereby declare that the following is a fullyclear, and exact description thereo My invention relates particularly to sprayers for applying paint, varnish and the like by means of compressed air and has for its object to provide a construction having a minimum number of parts and which will enable the delivery of the liquid to becontrolledfrom a point atfa" greater distance from the discharge end than has heretofore been possible, thereby'enabling more or less inaccessible points to-be easily reached' A invention, reference must be had to the. ac-

. companying drawings in which similar reflarger scale and illustrating the atomizer in erence "characters indicate the same parts,

and whereinz I A v Figure 1 is aside elevation of a sprayer constructed according to my invention; F

Figure 2 'is a similar view drawn to a section; I

F igure 3 Isa sectional view of thefitting connecting one end of the commingler pipe to the pressure line and section'line;

Figure-dais a transversesectional view taken on'dine 4 4; Figure 2; and Figure 5 is a detail modification ofthe means for manually actuati g the valve controlling thedischarge'outle of the sprayer. The embodiment of my invention 'illus} trated'in t he accompanying drawing consists of a commingler pipe comprisinga comparatively long section 2, a short section 3 and a flexible section 4 effecting a connection therebetween; The commingler pipe may be of any desired length having an atomizer upon the discharge end thereof. The atomizer is ofiset relatively to the pipe and comprises a casting in the form of an elbow 5 -oneend of which is screw threaded as at 6 for attachment to the commingler pipe while the opposite end terminates in a T' pointed out constituting a valve-case 7. The valve-case is disposed parallel to the .commingler pipe and its discharge end is closed "by. a cap 34 screwed thereon. This cap contains an opening 8 constituting a (valve seat for a needle-valve 9 the valve stem 10 of which extends axially through a stufiing-box 12 closing the opposite end of the valve-case, the free end of the valve stem being connected to the adjacent end of a push rod 13,

constituting an axial extension of the valve M stem and extending parallel" to commingler pipe 2. This push rod is of any desired length according to the length of sprayer re quired and it is slidably mounted in guide brackets 15 mountedupon the commingler pipe and held in position thereon by set screws 16. A helical spring 17 encircling the push rod and bearing between the bracket nearest the atomizer and a collar 18 upon the push rod, resiliently maintains the needle valve upon its seat. Any'means may be provided for opening and closing the valve. In the embodiment illustrated, this means consists of a nut 19 mounted upon the free end of they push rod which is screwthreaded as at 20. The nut is constructed I and arranged to bear against the adjacent guide bracket 15 and when rotated, tocause the push rod to feed axially therethrou h. An. enlargement 2 1 prevents complete is- .placement of the nut from the push rod.

To obtain a quick opening of the atomizer the-operator may exert an axial pull upon the push rod, the only'means resisting such a' pullbeing the spring 17 To maintain the push rod infull open position the latter'is provided with a lateral rib 22 which is adapted to normally register in ia notch 23 in the adjacent bearing bracket. When the push rod is in full open position ,the rib willbe located in rear ofthe bearing bracket and by a slight turn may be moved out of alignmenawith its notch 23 and conse-.' quently w11l actasa lock preventing the push rod returning to its initial position. The push rod is released from this position by turning it until the rib re'gisters with the notch at 'which point it will be automatically returned to the closed position under the in 'fluence of spring 17 It 'is to be distinctlyunderstood that this i is but one embodiment of my invention and i any means may be providedfor maintaining valve in full open the push-rod with the position. M

The end ofthe commingler pipe opposite to that connected to the atomizer is connected to the air pipe line 25 and to the suction line 26 leading from the tank (not shown) containing the paint, varnish or the like,

' air thereinto.

The nozzle is' screw-threaded as at 31 to enable it to be adjusted relatively to the .discharge opening 32 of the suction connection in order -thatthe suction Within the pipe may be increased or decreased as desired.

' It will,be seen that the arrangem'ent of the atomizer is such that the valve maybe 0 rated at a-considerable distance from the discharge end and consequently the operator is enabledto reachpoints which heretofore have been almost inaccessible with the spray-l are now in use, asfor instance in the painting of buildings and the like. Furthermore as the paint is commingled with the air .or

pressure medium at'a considerable distance from the atomizer a more perfect atomization is obtained than would be possible if p the air and suction lines were connected directly .to the atomizer.

Figure 5 illustr tesa modification of my invention, the nut 19 being replaced by a manually o erated lever 50.

What I c aim is as follows .1. A s rayer. of the type described consisting o a commingler pipe having a suction connection and a pressure connection at ing of a commingler pipe having a suction one end and an, offset discharge outletat its opposite end. I a

2. A s rayer of the type described consisting o a commingler pipe having a sue tion connection and pressure connection at l one end and an offset discharge outlet at its ite end, and valvular means control- QPPOS l ng sa d outlet. H h I 3. A sprayer of the type described consistconnection and pressure connection at one end and an ofiset' discharge outlet at its op-. posite end, valvular means controlling sald outlet said valvular means consisting of a manually o eratedvalvular nieniber extend-f ing paralle to said pipe and means'upon said pipe/ for supporting said member.

4. In a sprayer of the type described the combination with a commingler pipe having a discharge end; of an, atomizer upon the saidend 'and consistingof a fitting comprising an elbow oneendlof which is connected" to said and ajvalye case upon the discharge end of said elbow an disposed parallel-to said p1pe,-'said valve ase having a discharge outlet. and valvular means con- I 4 trolling said outlet.

is suction connection consists of e 5. In a sprayer of the type described the combination with a commingler pipe having of a valve within the valve-case, a push-ro connected t o said valve and located exteriorly of said valve-case, and means upon.

the commingler, pipefor supporting the V push-rod thereon.

6; In a sprayer of the type described the combination with a commingler pipe hav-' ing a discharge end; ofan atomizer upon the saidend and consisting of. a fitting com-- prising an elbow one end of which is connected to said pipe and a valve-case upon the dischar e end of said elbow and disposed paral e1 to said pipe, said valve-case ha-vin contro ling said outlet said means consist ing of a valve within the valve-case, a pushrod connected to said valve and located exteriorly of said valve-case, means upon the commingler pipe for supportin the pushrod thereon, and means for resiliently maintaining the valve u on its valve seat.

7. In a sprayer o the type described the combination with a commingler pipe having a discharge end; of. an atomizer upon the said end and consisting of a fitting comprising an elbow one end of which Is connected to said pi e and a valve-case ypon the discharge en of said elbow and disposed paral el to said pipe, said valve case iavin a discharge outlet, valvular means contro ling said outlet, saidmeans consist ing of a" valve within the valve-case, a pusha discharge outlet, valvular means' comnfingler pipe for supportingv the push- I rod thereon, and means for maintaining the valve full open position.

8 In a sprayer of the type described the combination with a commingler pipe having a discharge end; of an atomizer upon the saiden and consisting of a fitting comprising an elbow one endof 'which is connected to said pipe a valve-case upon the discharge end of said elbow and disposed parallel to said pipe, said valve case having a discharge outlet, valvular means controlling said outlet said means consisting of'a valve within the valve-case and apush-iod connected to said valve and locatedfe xteriorly of said valve-case, means upon the com-- mingler pipe for supporting the push-rod thereon, and manually operated means for causing longitudinal movement of said push-rod. V

9. In a sprayer the combination with closed receptacle, and a pressure line; of

, said pipe and having a discharge outlet in one end, valvular means controlling said outlet said means consisting of a valve located within the valve case and controlling said outlet, a push-rod extending parallel to said commingler pipe into said valvecase and carrying said valve, brackets mounted upon said pipe and slidably supporting said push-rod the latter being axially movable therethrough, means located exteriorly of the valve-case for yieldingly maintaining the valve in position controlling the outlet said means consisting of an abutment upon said push-rod and a helical spring encircling the latter and bearing between the abutment and one of said brackets.

10. In a sprayer the combination with a closed receptacle and a pressure line; of an elongated commingler pipe of diminutive bore having a pressure connection and a suction connection at one end, the former being connected to said pressure line and the latter to the interior of said receptacle, an atomizerupon the discharge end of said pipe and consisting of a fitting comprising an elbow one end of which is connectedto said pipe and a, valve-case upon the other end of said elbow and disposed parallel to said pipe and having a discharge outlet in one end, valvular means controlling said outlet said means consisting of a valve located within the valve-case and controlling said outlet, a push-rod extending parallel to said tcommingler pipeinto said valvecase and carrying said' valve, brackets mounted upon said pipe and slidably supporting said push-rod the latter being axially movable therethrough, means located exteriorly of the valve-case for yieldingly maintaining the valve in position control- I ling the outlet said means consisting of an abutment upon said push-rod, a helical spring encircling the latter and bearing between the abutment and one of said brackets, means for maintaining the valve in open, position said means consisting of a lateral projection upon said push-rod adapted to be positioned behind one of said brackets when the push-rod is withdrawn I said bracket having a notch therein adapted to permit the passage therethrough of said projection when the valve is returned to closed position.

11. In a sprayer the combination with a closed receptacle and a pressure line; of an elongated commingler pipe of diminutive bore having a pressure connection and a suction connection at one end, the former being connected to said pressure line and the latter to the interior of said receptacle, an atomizer upon the discharge end of said pipe and consisting of a fitting comprising an elbow one end of which is connected tosaid pipe and a valve case upon the other ling the outlet said means consisting of an abutment upon said push-rod a helical spring encircling the latter and bearing between the abutment and one of said brackets, and adjustable means for limiting the closing movement of the valve.

12. In a sprayer the combination with a closed receptacle and a pressure linegqof an elongated commingler pipe of diminutive bore having a pressure connection and a suction connection at one end, the former being connected to said pressure line and the latter to the interior of saidreceptacle, an atomizer upon the discharge end of said pipe and consisting of a fitting comprising an elbow one end of which is connected to said pipe and a valve-case upon the other end of said elbow and disposed parallel to said pipe and having a discharge outlet inone end, valvular Qmeans controlling said outlet aid meansconsisting of a valve located within the valve-case and controlling said outlet, 8. push-rod extending rallel to said commingler pipe into said Va ve-case said means consisting of an abutment upon said push-rod, a. helical spring encircling the latter and bearing between the abutment and one of said brackets, and adjustable means for limiting the closing 'movement of the valve said last-mentioned means consisting of an axially movable nut screwed upon the free end of said push-rod and adapted to-bear against one of said brackets.

13. In asprayer the combination with a closed receptacle and aipressure line; of an comminigler pi e of diminutive swing a pressure connection and a su'ctiofi obnnection at-one end, the concaten te said presur'e line and the latter"to the interior of'said receptacle, an .atomizerupon thedisc'harge end of said pipe ""and'c'onsisting of a fitting comprising an elbow one end of which is connected to said pipe and a Valve-case upon the other end 11 ofsa-idelbow and disposed parallel to said pipe'and having a discharge outlet in one end, valvular means controlling said outlet said means-consisting of a valve located. within the valve case and controlling said 15 outlet, a push-rod extending parallel to said commingler pipe into said valve-case and carrying said valve, brackets mounted upon said pipe and. slidably supporting said pushrod the latter being axially movable there- 2 through, means located exteriorly of the valve-case for yieldingl maintaining the valve in position controlling the outlet said means' ;consisting of an abutment u on said ush-rod, a helical, spring encirc ingthe atter and bearing between the abutment and, one of said brackets, and adjustable means for limiting the closin -movement of the said last mentioned means consisting of an axially movable nut screwed upon the end of said push-rod and adapted bear against one of said brackets, means for maintaining the valve in open positionsaid'means consisting; of a lateral projection upon-said push-rod adapted to be posit'ion behind one of said brackets when the .jpush-rod is withdrawn, said bracket having," 'a-notch therein adaptedto permit the pas Y sage therethrough of said projection when 1 the valve is returned 'to' closed position.- 40 141' In a sprayer the'combination with a ,col nmin'ler pipe'hav-ing a pressure connection an suction connection at one end;of an atomizer upon the opposite end thereof "consisting f a fitting comprising an elbow" one 'endjof which is connected to said pi e and a hollow,'cylindricalvalve-case upontlie d-ischar end of said' elbowand disposed j 'paralle 'to said ipe ncend of said valveca'se bein constitutedby aremovable cap screwcd t ereon and containing a discharge outletand'tlie' 'othen'end being closed by a' ,stufling-box, valvularImeanslcontrolling said 7 outlet and consisting of a" valve within said i valve-caseanda push-rod extendingslidably tliil ohgh said stuffin'g-box and;,'carryi ng said -a ve; J 1 v Injasprayer'the combination with a omjnin ler pipe'having' a pressure connecsnction connectiomat one end; 0 atomizer upon the opposltefiend thereof onsis'tingf a: fitting comprising "an elbow l the discharge en of said elbow and disposed I constituted by a removable cap ereon and containing a discharge case bein screwed t former being outlet and the other-end being closed by a stufling-box, valvular means controlling said outlet and consisting are valvewithin said valve-case and a push-rod extending slidably throu h said stufling-box and carrying said valve, rackets mounted upon said commingler pipe and slidably carrying said push rod means located exteriorly of the valve-case for yieldingly maintaining the valve in position ClOSlIlg' said outlet said last-mentioned means consisting of a collar located in fixed position u n said push-rod, and a helical spring encirc ing the latter and bearingbetween said collar and one of said i bi'ackets.

16. In a sprayer the combination with a comminfler pipe having a pressure connection an suction connection at one end; ofan atomizer upon the opposite end thereof consisting of a fitting comprising an elbow one end of which is connected to said pi e and a hollow cylindrical valve-case upon the discharge end of said elbow and disposed parallel to saidpipe' one end of said valvecase ,bein constltuted by a removable cap screwed t ereon and containing'a discharge outlet and the other end being closed b a stufling box, valvular means controlling said outlet and consisting of a valve within said val ve-case and a push-rod extending slidably through said stufling-box and carrying said valve, brackets mounted ,upon said commingler pipe and slidably carrying said push-rod, means located exteriorly .of'the valve-case for yieldingly maintaining the valve in position ClOSlIlg said outlet said last-mentioned means consisting of a collar 7 loc'ated in fixed position upon said push-rod, 105 a'helical spring encirclingthe latter and bearing between said collar and one of said brackets, means for maintaining the valve in open position said means consisting of a projection upon said push-rod adapted to be positioned in engagement with one of said brackets whenihe push-rod is withdrawn. 17. In a sprayer the combination with a commin ler pipe havin'ga pressure connection-an suction connection'at-one end: of

an atomizer upon the opposite end thereofconsisting of a fitting comprising an elbow one end of whichis connected to .saidipi and a hollow cylindrical valve-case upon t e dischargeend of said elbow and disposed 1'20 paralle to said pipe one end of said valve:

case bein constituted. by a, removable cap screwed t ereon and containing a discharge f voutlet and the other end being closed by a stufiin'g-box, valvular means controlling said outlet and consisting of a valve within said valve-case and a push-rod extending slidably through said stufling-box and carrying said yalve, brackets mounted upon said commingler pipe nd slidably carrying said 130 push-rod, means located exteriorly of the valve-case for yieldingly maintaining the valve in position closing said outlet said lastmentioned means consisting of a collar located in fixed position upon said push-rod, a helical spring encircling the latter and bearing between said collar and one of said brackets, and adjustable means for limiting the closing movement of the valve.

18. In a sprayer the combination with a commingler pipe having a pressure connection and suction connection at one end; of an atomizer "upon the opposite end thereof consisting of a fitting comprising an elbow 7 outlet and conslsting of a valve Within said valve-case and a push-rod extending slidably through said stuffing-box and carrying said valve, brackets mounted upon said commingler pipe and slidably carrying said push-rod, means located exteriorly of the valve-case for yieldingly maintaining the .valve in position closing said outlet said lastmentioned means consisting of a collar located in fixed position upon said push-rod,

a helical spring encircling the latter and bearing between said collar and one of said brackets and adjustable means for limiting the closing movement of the valve, said last mentioned means consisting of a nut screwed upon the free end of said push-rod and adapted to bear against one of said brackets.

In testimony whereof I have signed my name to this specification in the presence of two witnesses.

WILLIAM A. PITT. Witnesses:

GoRnoN G. CooKE, WILLIAM J. C. HEWETSON: 

